Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
  • Effective date searches are available only for US area codes. Our sources for non-US NPA-NXX data do not provide this information.
  • If you want to search an entire area code regardless of activity, leave both the next and past days fields set to zero.

Switch: BRPTCT04DS0

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
203-843 A New Haven CT 7421 AT&T - LOCAL 920      
203-843 9 New Haven CT 7421 AT&T - LOCAL 920      
203-871 5 Branford CT 7421 AT&T - LOCAL 920   2006-07-10   
860-381 3 Ledyard CT 7421 AT&T - LOCAL 920   2001-07-10   
860-639 2 Norwich CT 7421 AT&T - LOCAL 920   2001-11-13   

Last updated: Sun, 26 Jan 2025 15:59:20 UTC

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